Where does “rostsparv” come from?

rostsparv (Swedish) comes from Swedish sparv, from Old Swedish sparver, from Middle English sperver, from Old French esprevier, from Old Dutch *sparwari, from Proto-Germanic sparwaraz, from Proto-Germanic arô, from Proto-Indo-European er- — eagle, bird; loose, light, rare, sparse; to fail,...

rostsparv (Swedish): Cretzschmar's bunting, (Emberiza caesia)

Definitions

  1. Cretzschmar's bunting, (Emberiza caesia)

Ancestry of “rostsparv”, step by step

rostsparv traces back through two separate lines of ancestry.

via Swedish sparv

StepLanguageWordMeaning
1Swedishsparva sparrow; most commonly the house sparrow (gråsparv, Passer domesticus), but including various species of small birds in the families sparrows (sparvfinkar, Passeridae) and buntings (fältsparvar, Emberizidae), all in the order Passeriformes (tättingar)
2Old Swedishsparver
3Middle Englishsperversparrowhawk
4Old Frenchespreviersparrowhawk
5Old Dutch*sparwari
6Proto-Germanicsparwarazsparrow-hawk
7Proto-Germanicarôeagle
8Proto-Indo-Europeaner-eagle, bird; loose, light, rare, sparse; to fail,...

via Swedish röst

StepLanguageWordMeaning
1Swedishröstvoice; vote
2Germanrōstroofing frame
3Middle High Germanrōst
4Old High Germanrōst
5Old Frenchrostirto roast; to torture by subjecting to fire
6Frankishrōstjanto roast
7Proto-Germanicraustijanąto roast
8Proto-Indo-European*Hrews-
Every word from Proto-Indo-European er-